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Why does the string for the -split parameter require two backslashes while the string for the -join parameter requires only one backslash? The backtick is the escape character in Powershell. What does a backslash preceding a character do for you?
$path = 'C:\folder\test\unit1\testing\results\report.txt'
$path -split '\\' -notlike '*test*' -join '\'
http://powershell.com/cs/blogs/tips/archive/2014/06/17/fun-with-path-names.aspx
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PowerShell uses backquote as the escape character. As a mnemonic, think of the backquote as a small backslash.
Can you give us a bit more details about your code? (To escape the backslash you need to use double backslash : "\\" instead of "\".)
The PowerShell escape character is the backtick "`" character. This applies whether you are running PowerShell statements interactively, or running PowerShell scripts.
Unicode character (`u{x}) This special character was added in PowerShell 6.0. The Unicode escape sequence ( `u{x} ) allows you to specify any Unicode character by the hexadecimal representation of its code point.
-split splits on a regex by default. So it is the regex that requires escaping a backslash. You can tell PowerShell not to use a regex like so:
$path -split '\',-1,'SimpleMatch'
-join is just taking whatever characters you supply to use as the delimiter to stick between the strings being joined.
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